he was killed in the attack in benghazi. f.b.i. acts are now in libya investigating the attack alongside local authorities. >>> 350,000 students will be going back to class in chicago today. that's because the teachers strike that kept them out of class for seven days is now over. union delegates voted to end that walkout last knight. they agreed to a new contract deal -- last night. they agreed to a new contract deal. this is the third largest school system. this is a big deal. >>> in campaign 2012, new polls from cbs news show president obama is more likely to win a second term in office. in virginia and wisconsin, the president's leads are now beyond the margin of error. >>> there is a new report that finds america's obesity especial dependic is only growing. we have one of the authors of that report coming up soon. >>> if you're trying to lose weight or lower your arrive for certain diseases, a local chef is here with his secrets to keeping the flavor while losing calories. jess? >> military families often struggle with their f